Determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 225 is a difference of squares: (y – 15)(y + 15) is a difference of squares: (y – 15)2 is not a difference of squares is a difference of squares: (y + 15)2

The correct answer option is: it is a difference of squares:  (y – 15)(y + 15)

Step-by-step explanation:

We are given a polynomial and we are to determine if it is a difference of squares.

Let us recall the algebraic formulas which include:

So if we look closely, we can conclude that the given polynomial observes the third formula of the perfect squares.

Hence, we can say that it is a difference of squares:  (y – 15)(y + 15)